Home / 20,161.71-27,821.58-11,208.67

Finding the Fourth Proportional to 20,161.71, 27,821.58 and 11,208.67

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Solution

The fourth proportional to 20,161.71, 27,821.58 and 11,208.67 is: 15,467.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,161.71 : 27,821.58 = 11,208.67 : x
  2. Step 2: Convert to fraction form
    20,161.71/27,821.58 = 11,208.67/x
  3. Step 3: Cross multiply
    20,161.71x = 27,821.58 × 11,208.67
  4. Step 4: Simplify right side
    20,161.71x = 311,842,937.12
  5. Step 5: Solve for x
    x = 311,842,937.12/20,161.71
  6. Step 6: Final answer
    x = 15,467.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.